[R] merging two data sets with no column header

David Winsemius dwinsemius at comcast.net
Wed Jun 4 07:44:23 CEST 2008

Thanks for your reply. 

In your last step If  I create a duplicate ( two similar records )
# create a duplicate 
vv[8,1] <- 7

and then I merge vv with vv2 ,both duplicates are merged. Is there a way to
tell R to merge only the unique records.


I don't think merge will do what you are asking. Suspect you would need to
do it either before the merge or after. I tried using the Extract operator
on a merged dataset, but only succeeded in omitting the duplicated items, 
not both instances.

David Winsemius

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